Actuator Disc for Helicopter Rotors in the Unstructured Flow Solver TAU
Schweikhard, R. and Le Chuiton, F. (2005) Actuator Disc for Helicopter Rotors in the Unstructured Flow Solver TAU. 31st European Rotorcraft Forum, 2005-09-13 - 2005-09-15, Firenze, Italy.
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Motivated by the demand for a fast flow simulation tool that takes the interaction between rotor and helicopter fuselage into account an actuator disc boundary condition suited for helicopter rotors in forward flight has been implemented in the unstructured DLR TAU code. The time-averaged effect of the rotor, which accelerates the flow and adds energy to the fluid is imposed using source terms in the Navier-Stokes equations where the actuator disc is located in the grid. The transfer of this approach previously implemented in the structured DLR FLOWer code, involved adapting the strategy to the unstructured framework. It is shown that propeller simulation results are in accordance to FLOWer results and simple 1D theory predictions. Moreover, rotor in forward flight cases prove the robustness of the implementation and resemble FLOWer results. Further development involved testing the implementation in parallel mode and a more sophisticated rotor force distribution is applied instead of a constant pressure jump. Finally, a comparison of the viscous flow field around the EC145 helicopter computed by TAU and FLOWer is performed. It shows that there is good agreement between the two codes in predicting the effect of the actuator disc on the fuselage pressure distribution.
|Document Type:||Conference or Workshop Item (Paper)|
|Title:||Actuator Disc for Helicopter Rotors in the Unstructured Flow Solver TAU|
|Keywords:||Helicopter Aerodynamics, Actuator Disc, Interactional Aerodynamics, Unstructured CFD|
|Event Title:||31st European Rotorcraft Forum|
|Event Location:||Firenze, Italy|
|Event Type:||international Conference|
|Event Dates:||2005-09-13 - 2005-09-15|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L AR - Aircraft Research|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L AR - Aircraft Research|
|DLR - Research theme (Project):||L - Concepts & Integration|
|Location:||Köln-Porz , Braunschweig , Göttingen|
|Institutes and Institutions:||Institute of Aerodynamics and Flow Technology|
|Deposited By:||Claudia Grant|
|Deposited On:||11 Jan 2006|
|Last Modified:||14 Jan 2010 20:00|
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